"Now,
without taking anybody out of service, we can fix a magnetized CT in less than 1
minute!"

CT
Demagnetization
Circuit--600-DMG1

Before
Demag--Ratio
212.4

After Demag--Ratio 200.2

Many
of you have seen a measured ratio test reading of a CT that was not what it should
be:For
example, a 200:5 CT that measured out to be 212:5 but passed the burden test.This is a magnetized CT.And what can you do about it?Either nothing or change out the CT.Now there is a 3rd option:The Spinlab Demag Circuit used in tandem with the Bird Dog Plus.Of the 32 failure modes of a meter circuit, magnetized CTs are by far the
most common ones after installation errors.A magnetized CT can be caused by a lightning strike, ground fault, or
open circuiting a CT.With this shoebox size device, you simply attach the duckbill connector
to the phase of the test switch you want to demagnetize, turn the unit on, press
the Demag button, and in less than 1 minute your CT will be demagnetized.It is that easy, and you don’t have to take anything out of service!Never has increasing the accuracy of a CT-metered site been easier.Here’s more about the Demag circuit:

Works
on any CT-rated site—primary or secondary

Works
on secondary current from 0.2 to 10 amps

Safety
lockouts built in for excessive current, voltage, and temperature readings

Interfaces
directly to the Bird Dog Plus for easy before and after monitoring to prove
results

Compact
size and weight allows you to carry it easily from site to site

Automatically
predetermines the extent of the test needed to demagnetize a CT based on
load and degree of magnetization